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freebsd_ioctl.c revision 1.13 
      1 /*	$NetBSD: freebsd_ioctl.c,v 1.13 2007/05/29 21:32:27 christos Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1995 Frank van der Linden
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *      This product includes software developed for the NetBSD Project
     18  *      by Frank van der Linden
     19  * 4. The name of the author may not be used to endorse or promote products
     20  *    derived from this software without specific prior written permission
     21  *
     22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     25  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     26  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     27  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     28  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     29  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     30  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     31  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     32  */
     33 
     34 #include <sys/cdefs.h>
     35 __KERNEL_RCSID(0, "$NetBSD: freebsd_ioctl.c,v 1.13 2007/05/29 21:32:27 christos Exp $");
     36 
     37 #include <sys/param.h>
     38 #include <sys/systm.h>
     39 #include <sys/proc.h>
     40 #include <sys/mount.h>
     41 #include <sys/sockio.h>
     42 
     43 #include <sys/syscallargs.h>
     44 
     45 #include <net/if.h>
     46 
     47 #include <compat/sys/sockio.h>
     48 
     49 #include <compat/freebsd/freebsd_syscallargs.h>
     50 #include <compat/common/compat_util.h>
     51 #include <compat/freebsd/freebsd_ioctl.h>
     52 
     53 #include <compat/ossaudio/ossaudio.h>
     54 #include <compat/ossaudio/ossaudiovar.h>
     55 
     56 /* The FreeBSD and OSS(Linux) encodings of ioctl R/W differ. */
     57 static void freebsd_to_oss(struct freebsd_sys_ioctl_args *,
     58 			   struct oss_sys_ioctl_args *);
     59 
     60 static void
     61 freebsd_to_oss(uap, rap)
     62 struct freebsd_sys_ioctl_args *uap;
     63 struct oss_sys_ioctl_args *rap;
     64 {
     65 	u_long ocmd, ncmd;
     66 
     67         ocmd = SCARG(uap, com);
     68         ncmd = ocmd &~ FREEBSD_IOC_DIRMASK;
     69 	switch(ocmd & FREEBSD_IOC_DIRMASK) {
     70         case FREEBSD_IOC_VOID:  ncmd |= OSS_IOC_VOID;  break;
     71         case FREEBSD_IOC_OUT:   ncmd |= OSS_IOC_OUT;   break;
     72         case FREEBSD_IOC_IN:    ncmd |= OSS_IOC_IN;    break;
     73         case FREEBSD_IOC_INOUT: ncmd |= OSS_IOC_INOUT; break;
     74         }
     75         SCARG(rap, fd) = SCARG(uap, fd);
     76         SCARG(rap, com) = ncmd;
     77         SCARG(rap, data) = SCARG(uap, data);
     78 }
     79 
     80 
     81 static void freebsd_to_netbsd_ifioctl(struct freebsd_sys_ioctl_args *uap,
     82 				      struct sys_ioctl_args *nap);
     83 
     84 static void
     85 freebsd_to_netbsd_ifioctl(uap, nap)
     86 	struct freebsd_sys_ioctl_args *uap;
     87 	struct sys_ioctl_args *nap;
     88 {
     89 	u_long ocmd, ncmd;
     90 	ocmd = SCARG(uap, com);
     91 	switch (ocmd) {
     92 	case FREEBSD_SIOCALIFADDR:
     93 		ncmd =SIOCALIFADDR;
     94 		break;
     95 	case FREEBSD_SIOCGLIFADDR:
     96 		ncmd =SIOCGLIFADDR;
     97 		break;
     98 	case FREEBSD_SIOCDLIFADDR:
     99 		ncmd =SIOCDLIFADDR;
    100 		break;
    101 	case FREEBSD_SIOCGIFMTU:
    102 		ncmd = SIOCGIFMTU;
    103 		break;
    104 	case FREEBSD_SIOCSIFMTU:
    105 		ncmd = SIOCSIFMTU;
    106 		break;
    107 	default:
    108 		ncmd = ocmd;
    109 		break;
    110 	}
    111 	SCARG(nap, fd) = SCARG(uap, fd);
    112 	SCARG(nap, com) = ncmd;
    113 	SCARG(nap, data) = SCARG(uap, data);
    114 }
    115 
    116 int
    117 freebsd_sys_ioctl(l, v, retval)
    118 	struct lwp *l;
    119 	void *v;
    120 	register_t *retval;
    121 {
    122 	struct freebsd_sys_ioctl_args /* {
    123 		syscallarg(int) fd;
    124 		syscallarg(u_long) com;
    125 		syscallarg(void *) data;
    126 	} */ *uap = v;
    127         struct oss_sys_ioctl_args ap;
    128 	struct sys_ioctl_args nap;
    129 
    130 	/*
    131 	 * XXX - <sys/cdio.h>'s incompatibility
    132 	 *	_IO('c', 25..27, *):	incompatible
    133 	 *	_IO('c', 28... , *):	not exist
    134 	 */
    135 	/* XXX - <sys/mtio.h> */
    136 	/* XXX - <sys/scsiio.h> */
    137 	/* XXX - should convert machine dependent ioctl()s */
    138 
    139 	switch (FREEBSD_IOCGROUP(SCARG(uap, com))) {
    140 	case 'M':
    141         	freebsd_to_oss(uap, &ap);
    142 		return oss_ioctl_mixer(l, &ap, retval);
    143 	case 'Q':
    144         	freebsd_to_oss(uap, &ap);
    145 		return oss_ioctl_sequencer(l, &ap, retval);
    146 	case 'P':
    147         	freebsd_to_oss(uap, &ap);
    148 		return oss_ioctl_audio(l, &ap, retval);
    149 	case 'i':
    150 		freebsd_to_netbsd_ifioctl(uap, &nap);
    151 		return sys_ioctl(l, &nap, retval);
    152 	default:
    153 		return sys_ioctl(l, uap, retval);
    154 	}
    155 }
    156